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// 2002-01-23 Loren J. Rittle <rittle@labs.mot.com> <ljrittle@acm.org>
// Adapted from http://gcc.gnu.org/ml/gcc-bugs/2002-01/msg00679.html
// which was adapted from pthread1.cc by Mike Lu <MLu@dynamicsoft.com>
//
// Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2009
// Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
// { dg-do run { target *-*-freebsd* *-*-netbsd* *-*-linux* *-*-solaris* *-*-cygwin *-*-darwin* alpha*-*-osf* mips-sgi-irix6* } }
// { dg-options "-pthread" { target *-*-freebsd* *-*-netbsd* *-*-linux* alpha*-*-osf* mips-sgi-irix6* } }
// { dg-options "-pthreads" { target *-*-solaris* } }
#include <string>
#include <list>
#include <pthread.h>
using namespace std;
static list<string> foo;
static pthread_mutex_t fooLock = PTHREAD_MUTEX_INITIALIZER;
static pthread_cond_t fooCondOverflow = PTHREAD_COND_INITIALIZER;
static pthread_cond_t fooCondUnderflow = PTHREAD_COND_INITIALIZER;
static unsigned max_size = 10;
#if defined(__CYGWIN__)
static int iters = 10000;
#else
static int iters = 300000;
#endif
void*
produce (void*)
{
for (int num = 0; num < iters; )
{
string str ("test string");
pthread_mutex_lock (&fooLock);
while (foo.size () >= max_size)
pthread_cond_wait (&fooCondOverflow, &fooLock);
foo.push_back (str);
num++;
if (foo.size () >= (max_size / 2))
pthread_cond_signal (&fooCondUnderflow);
pthread_mutex_unlock (&fooLock);
}
// No more data will ever be written, ensure no fini race
pthread_mutex_lock (&fooLock);
pthread_cond_signal (&fooCondUnderflow);
pthread_mutex_unlock (&fooLock);
return 0;
}
void*
consume (void*)
{
for (int num = 0; num < iters; )
{
pthread_mutex_lock (&fooLock);
while (foo.size () == 0)
pthread_cond_wait (&fooCondUnderflow, &fooLock);
while (foo.size () > 0)
{
string str = foo.back ();
foo.pop_back ();
num++;
}
pthread_cond_signal (&fooCondOverflow);
pthread_mutex_unlock (&fooLock);
}
return 0;
}
int
main (void)
{
#if defined(__sun) && defined(__svr4__) && _XOPEN_VERSION >= 500
pthread_setconcurrency (2);
#endif
pthread_t prod;
pthread_create (&prod, NULL, produce, NULL);
pthread_t cons;
pthread_create (&cons, NULL, consume, NULL);
pthread_join (prod, NULL);
pthread_join (cons, NULL);
return 0;
}
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